Wireless communication device and wireless communication method

Abstract

A wireless communication device includes a mixer that multiplies quadrature-modulated transmission data by a local oscillation frequency signal and outputs a high-frequency signal; a distributor that distributes the high-frequency signal; a detector circuit that detects a direct current component included in the high-frequency signal, based on the high-frequency signal distributed by the distributor; a correction signal generating unit that generates a correction signal for removing the direct current component from the high-frequency signal, based on the direct current component detected by the detector circuit; a correction unit that corrects the high-frequency signal by the correction signal generated by the correction signal generating unit; and a transmission unit that transmits the high-frequency signal that has been corrected by the correction unit.

The invention claimed is: 
     
       1. A wireless communication device comprising:
 a mixer configured to multiply quadrature-modulated transmission data by a local oscillation frequency signal and output a high-frequency signal; 
 a distributor configured to distribute the high-frequency signal; 
 a detector circuit configured to detect a high-frequency direct current component included in the high-frequency signal, based on the high-frequency signal distributed by the distributor; 
 a correction circuit configured to generate a correction signal for removing the high frequency direct current component from the high-frequency signal, based on the high frequency direct current component detected by the detector circuit; 
 an adder configured to correct the high-frequency signal by the correction signal generated by the correction circuit; 
 a controller configured to determine whether the quadrature-modulated transmission data includes a direct current component; and 
 a transmission unit that transmits the high-frequency signal that has been corrected by the adder, 
 wherein, when the controller determines that the quadrature-modulated transmission data does not include the direct current component, the controller causes the adder to correct the high-frequency signal by the correction signal generated by the correction circuit. 
 
     
     
       2. The wireless communication device according to  claim 1 ,
 wherein the adder corrects the high-frequency signal output from the distributor by the correction signal to be generated by the correction circuit. 
 
     
     
       3. The wireless communication device according to  claim 1 ,
 wherein the adder corrects the high-frequency signal output from the mixer by the correction signal to be generated by the correction circuit, and 
 wherein the distributor distributes the high-frequency signal that has been corrected by the adder. 
 
     
     
       4. The wireless communication device according to  claim 1 ,
 wherein the adder corrects the quadrature-modulated transmission data by the correction signal to be generated by the correction circuit, and 
 wherein the mixer multiplies the quadrature-modulated transmission data that has been corrected by the adder by the local oscillation frequency signal, and outputs the high-frequency signal. 
 
     
     
       5. A wireless communication method for a wireless communication device, the wireless communication method comprising:
 generating a high-frequency signal by multiplying quadrature-modulated transmission data by a local oscillation frequency signal; 
 distributing the high-frequency signal; 
 detecting a high-frequency direct current component included in the high-frequency signal, based on the high-frequency signal distributed by the distributing; 
 generating a correction signal for removing the high-frequency direct current component from the high-frequency signal, based on the high-frequency direct current component detected by the detection step; 
 correcting the high-frequency signal by the correction signal generated by the correction signal generating step; 
 determining whether the quadrature-modulated transmission data includes a direct current component; and 
 transmitting the high-frequency signal that has been corrected by the correcting, 
 wherein, when the determining determines that the quadrature-modulated transmission data does not include the direct current component, the determining causes the correcting to correct the high-frequency signal by the correction signal generated by the generating.